Shock-absorber spring and blank therefor



N. SCHACHTER. SHOCK ABSORBER SPRING AND BLANK THEREFOR.

APPLICATION FILED SEPT. 8. 1919.

Patepted Sept. 14, 1920.

UNl'lED srarss PAT sNT OFFICE.

NATHAN scneonrnn; or onr'oaoo, ILLINOIS.

SHOCK-ABSORBER srnING Ann BLANK. THEREFOR.

Original application filed February 11, 1918, Serial To all whom it may concern:

.DQ it known that I, hiirimn boI-IAcHInn, a citizen of the United States, and-a resident of the city of Chicago, in the county of Cool: and State of lllinois have invented certain new and useful improvements in fihoclr-ribsorber Springs and Blanks There for; and 1 do hereby declare that the fol lowing is a full clear, and ex ct description of the same, reference being had to the accompanying drawings and to the numerals of reference marked thereon, which form a part of this specification.

'lhis invention relates to plate springs and blanks for the manufacture of siuh springs which are particularly adapted to serve as shock absorber springs for vehicles and similar purposes.

This application is a divisional of my eopending application, Serial No. 2l6,52o, tiled February 11, 1918.

An object of the invention is to provide a spring and a blank for making such a spring which will effectively restrict the movement of the parts so as to move only in the direction in which they are adapted to yieli and will provide the desired resiliency and which may be cut from stock with a very small percentage of waste.

Other and further important objects of this invention will be apparent from .the disclosures in the drawings and specification.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

(in the drawings:

Figure l is a fragmentary side elevation of a chassis and spring between which an absorber spring embodying the invention Specification of Letters Patent.

is a side elevation of the absorber The blank 6 from which the shock absorber spring is formed in any convenient way,

such as cutting a strip of sheet steel along diagonal parallel lines and-then trimming oil the tips of the 'th roof are bent to form the loops 2 and 4 by. which thesprlng 1S attached to the chassis 3 and main spring 5 respectively.

The circular portion 7 of the spring does not form a complete circle but there is a gap between the arms 8 adjacent the loop 7,

which gap gradually widens toward the outer ends of the arms 8. With this construction the compression or approximation of the outer ends of the arms 8 acts to contract the large circular portion 8 of the spring until the inner ends of the arms adjacent the ring 7 are closed. Further movement of the outer ends of the arms 8 toward each other tends to produce a separation of the inner ends of these expanding the ring cated in Fig. 2.

it is an important feature of this spring construction that the two arms 8 taper to their extremities and are proportioned so that the loop 7 will be sufiiciently strong to offer the desired initial resistance, and the taper arms have sufiicient elasticity so that if the loop 7 has been closed the compres sion is resisted with gradually increasing force after thepoint of contact between the arms approaches the outer ends of the spring. I

If the arms 8 of the spring are of uniform width or improperly tapered, they will not have the desired resiliency to gradually resist the shock but will offer an abrupt resistance when the inner ends thereof are. pressed together. The widened center portion or bight of the spring also serves to hold the arms 8 of the spring in the proper relative position for movement to and from each other and prevents twisting or relative movement transversely of their width, which might occur if the central portion of the spring was not comparatively wide.

7 in the manner indimay be produced I Patented Sept. 14, 1920. No. 216,526. Patent No. 1,331,677, dated February Divided and this applicationfiled September 8, 1919. Serial No. 322,360. 7

arms thereby again lVhile I. have shown my spring constructed in a certain form and produced by the performance of certain operations, I Wish it to be understood that I contemplate various changes and modifications and do not propose to limit the patent granted hereon otherwise than as necessitated by the appended claims.

I claim as my invention:

1. A shock absorber spring consisting of an elongated diamond shaped blank folded transversely so as to have an open circular bight portion, and similar, divergently curved tapered arms, and attaching means at the outer end of each arm.

gated cylindrical bight portion, and similar, 7 diver-gently curved tapered arms having the outer ends folded into a loop to provide means for attachment.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing Witnesses.

NATHAN SCHACHTER.

Witnesses CHAnL'ss W. IITLL, J11, EAnL M. Hannmn. 

